Combined seat and back portions for a chair



FIG. 1 is a perspective view of the combined seat and back portions for a chair embodying the subject of the design;

FIG. 2 is a top plan view of the seat portion with the back portion omitted for convenience of illustration;

FIG. 3 is a bottom plan view of FIG. 2;

FIG. 4 is a front elevational view of FIG. 2;

FIG. 5 is a rear elevational view of FIG. 2;

FIG. 6 is a left side elevational view of FIG. 2;

FIG. 7 is a right side elevational view of FIG. 2;

FIG. 8 is a front elevational view of the back portion with the seat portion omitted for convenience of illustration;

FIG. 9 is a rear elevational view of FIG. 8;

FIG. 10 is a left side elevational view of FIG. 8;

FIG. 11 is a right side elevational view of FIG. 8;

FIG. 12 is a top plan view of FIG. 8; and,

FIG. 13 is a bottom plan view of FIG. 8. 

The ornamental design for the combined seat and back portions for a chair, as shown and described. 